1 | /* |
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2 | * This program is free software; you can redistribute it and/or modify |
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3 | * it under the terms of the GNU General Public License as published by |
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4 | * the Free Software Foundation; either version 2 of the License, or |
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5 | * (at your option) any later version. |
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6 | * |
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7 | * This program is distributed in the hope that it will be useful, |
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8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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10 | * GNU General Public License for more details. |
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11 | * |
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12 | * You should have received a copy of the GNU General Public License |
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13 | * along with this program; if not, write to the Free Software |
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14 | * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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15 | * |
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16 | * Copyright (C) IBM Corp. 2005 |
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17 | * |
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18 | * Authors: Jimi Xenidis <jimix@watson.ibm.com> |
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19 | */ |
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20 | |
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21 | #include "ofh.h" |
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22 | #include <stdarg.h> |
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23 | #include <xen/lib.h> |
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24 | |
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25 | /* |
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26 | * 6.3.1 Access to the client interface functions |
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27 | * This is the spec'd maximum |
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28 | */ |
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29 | #define PFW_MAXSRVCLEN 31 |
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30 | |
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31 | static u32 ofh_maxsrvclen; |
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32 | |
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33 | extern s32 debug(const char *fmt, ...); |
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34 | |
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35 | s32 debug(const char *fmt, ...) |
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36 | { |
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37 | s32 sz; |
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38 | va_list ap; |
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39 | char buf[512]; |
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40 | va_start(ap, fmt); |
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41 | sz = vsnprintf(buf, 512, fmt, ap); |
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42 | va_end(ap); |
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43 | ofh_cons_write(buf, sz, &sz); |
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44 | |
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45 | return sz; |
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46 | } |
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47 | |
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48 | |
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49 | |
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50 | void |
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51 | assprint(const char *expr, const char *file, int line, const char *fmt, ...) |
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52 | { |
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53 | char a[15]; |
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54 | |
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55 | a[0] = '\n'; |
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56 | a[1] = '\n'; |
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57 | a[2] = 'O'; |
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58 | a[3] = 'F'; |
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59 | a[4] = 'H'; |
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60 | a[5] = ':'; |
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61 | a[6] = 'A'; |
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62 | a[7] = 'S'; |
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63 | a[8] = 'S'; |
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64 | a[9] = 'E'; |
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65 | a[10] = 'R'; |
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66 | a[11] = 'T'; |
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67 | a[12] = '!'; |
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68 | a[13] = '\n'; |
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69 | a[14] = '\n'; |
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70 | |
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71 | s32 actual; |
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72 | u32 t = 1; |
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73 | volatile u32 *tp = &t; |
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74 | |
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75 | (void)expr; (void)file; (void)line; (void)fmt; |
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76 | |
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77 | ofh_cons_write(a, sizeof (a), &actual); |
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78 | |
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79 | /* maybe I can break out of this loop manually (like with a |
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80 | * debugger) */ |
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81 | while (*tp) { |
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82 | continue; |
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83 | } |
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84 | } |
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85 | |
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86 | /* |
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87 | * we use elf hash since it is pretty standard |
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88 | */ |
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89 | static u32 |
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90 | of_hash(const char *s) |
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91 | { |
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92 | u32 hash = 0; |
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93 | u32 hnib; |
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94 | |
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95 | if (s != NULL) { |
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96 | while (*s != '\0') { |
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97 | hash = (hash << 4) + *s++; |
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98 | hnib = hash & 0xf0000000UL; |
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99 | if (hnib != 0) { |
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100 | hash ^= hnib >> 24; |
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101 | } |
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102 | hash &= ~hnib; |
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103 | } |
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104 | } |
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105 | return hash; |
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106 | } |
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107 | |
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108 | static void |
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109 | ofh_service_init(ulong b) |
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110 | { |
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111 | ulong sz; |
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112 | int i; |
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113 | int j = 0; |
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114 | struct ofh_srvc *o; |
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115 | struct ofh_srvc *ofs[] = { |
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116 | DRELA(&ofh_srvc[0], b), |
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117 | DRELA(&ofh_isa_srvc[0], b), |
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118 | NULL |
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119 | }; |
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120 | |
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121 | j = 0; |
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122 | while (ofs[j] != NULL) { |
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123 | /* find the maximum string length for services */ |
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124 | o = &ofs[j][0]; |
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125 | while (o->ofs_name != NULL) { |
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126 | const char *n; |
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127 | |
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128 | n = DRELA(&o->ofs_name[0], b); |
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129 | /* fix it up so we don't have to fix it anymore */ |
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130 | o->ofs_name = n; |
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131 | |
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132 | sz = strlen(n); |
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133 | if (sz > *DRELA(&ofh_maxsrvclen, b)) { |
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134 | *DRELA(&ofh_maxsrvclen, b) = sz; |
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135 | } |
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136 | o->ofs_hash = |
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137 | of_hash(n); |
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138 | ++i; |
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139 | ++o; |
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140 | } |
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141 | ++j; |
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142 | } |
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143 | } |
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144 | |
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145 | |
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146 | static void |
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147 | ofh_cpu_init(ofdn_t chosen, ulong b) |
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148 | { |
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149 | static struct ofh_ihandle _ih_cpu_0; |
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150 | void *mem = ofd_mem(b); |
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151 | u32 ih = DRELA((ulong)&_ih_cpu_0, b); |
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152 | struct ofh_ihandle *ihp = (struct ofh_ihandle *)((ulong)ih); |
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153 | const char *cpu_type = DRELA((const char*)"cpu",b); |
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154 | |
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155 | ofdn_t cpu = ofd_node_find_by_prop(mem, OFD_ROOT, |
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156 | DRELA((const char*)"device_type",b), |
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157 | cpu_type, 4); |
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158 | ihp->ofi_node = cpu; |
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159 | ofd_prop_add(mem, chosen, DRELA((const char *)"cpu", b), |
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160 | &ih, sizeof (ih)); |
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161 | } |
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162 | static s32 |
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163 | mmu_translate(u32 nargs, u32 nrets, s32 argp[], s32 retp[], ulong b) |
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164 | { |
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165 | /* FIXME: need a little more here */ |
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166 | nargs = nargs; |
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167 | nrets = nrets; |
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168 | argp = argp; |
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169 | retp = retp; |
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170 | b = b; |
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171 | return OF_SUCCESS; |
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172 | } |
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173 | |
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174 | static void |
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175 | ofh_mmu_init(ofdn_t chosen, ulong b) |
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176 | { |
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177 | static struct ofh_methods _mmu_methods[] = { |
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178 | { "translate", mmu_translate }, |
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179 | { NULL, NULL}, |
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180 | }; |
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181 | static struct ofh_ihandle _ih_mmu = { |
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182 | .ofi_methods = _mmu_methods, |
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183 | }; |
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184 | void *mem = ofd_mem(b); |
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185 | u32 ih = DRELA((ulong)&_ih_mmu, b); |
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186 | |
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187 | ofd_prop_add(mem, chosen, DRELA((const char *)"mmu", b), |
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188 | &ih, sizeof (ih)); |
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189 | } |
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190 | |
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191 | static void |
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192 | ofh_chosen_init(ulong b) |
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193 | { |
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194 | ofdn_t ph; |
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195 | void *mem = ofd_mem(b); |
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196 | |
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197 | ph = ofd_node_find(mem, DRELA((const char *)"/chosen", b)); |
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198 | |
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199 | ofh_vty_init(ph, b); |
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200 | ofh_cpu_init(ph, b); |
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201 | ofh_mmu_init(ph, b); |
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202 | } |
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203 | |
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204 | static void |
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205 | ofh_options_init(ulong b) |
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206 | { |
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207 | void *mem = ofd_mem(b); |
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208 | ofdn_t options; |
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209 | u32 size = 1 << 20; |
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210 | u32 base = b; |
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211 | char buf[20]; |
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212 | int i; |
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213 | |
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214 | |
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215 | /* fixup the ihandle */ |
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216 | options = ofd_node_find(mem, |
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217 | DRELA((const char *)"options", b)); |
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218 | |
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219 | i = snprintf(buf, sizeof (buf), "0x%x", base); |
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220 | ofd_prop_add(mem, options, DRELA((const char *)"real-base", b), |
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221 | buf, i); |
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222 | |
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223 | i = snprintf(buf,sizeof (buf), "0x%x", size); |
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224 | ofd_prop_add(mem, options, DRELA((const char *)"real-size", b), |
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225 | buf, i); |
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226 | } |
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227 | |
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228 | static void |
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229 | ofh_init(ulong b) |
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230 | { |
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231 | ulong sz = (ulong)_end - (ulong)__bss_start; |
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232 | /* clear bss */ |
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233 | memset(__bss_start + b, 0, sz); |
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234 | |
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235 | ofh_service_init(b); |
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236 | ofh_chosen_init(b); |
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237 | ofh_options_init(b); |
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238 | } |
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239 | |
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240 | static ofh_func_t * |
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241 | ofh_lookup(const char *service, ulong b) |
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242 | { |
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243 | int j; |
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244 | u32 hash; |
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245 | struct ofh_srvc *o; |
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246 | struct ofh_srvc *ofs[] = { |
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247 | DRELA(&ofh_srvc[0], b), |
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248 | DRELA(&ofh_isa_srvc[0], b), |
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249 | NULL |
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250 | }; |
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251 | u32 sz; |
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252 | |
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253 | sz = *DRELA(&ofh_maxsrvclen, b); |
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254 | |
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255 | if (strnlen(service, sz + 1) > sz) { |
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256 | return NULL; |
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257 | } |
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258 | |
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259 | hash = of_hash(service); |
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260 | |
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261 | j = 0; |
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262 | while (ofs[j] != NULL) { |
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263 | /* yes this could be quicker */ |
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264 | o = &ofs[j][0]; |
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265 | while (o->ofs_name != NULL) { |
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266 | if (o->ofs_hash == hash) { |
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267 | const char *n = o->ofs_name; |
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268 | if (strcmp(service, n) == 0) { |
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269 | return o->ofs_func; |
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270 | } |
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271 | } |
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272 | ++o; |
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273 | } |
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274 | ++j; |
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275 | } |
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276 | return NULL; |
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277 | } |
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278 | |
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279 | s32 |
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280 | ofh_nosup(u32 nargs __attribute__ ((unused)), |
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281 | u32 nrets __attribute__ ((unused)), |
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282 | s32 argp[] __attribute__ ((unused)), |
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283 | s32 retp[] __attribute__ ((unused)), |
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284 | ulong b __attribute__ ((unused))) |
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285 | { |
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286 | return OF_FAILURE; |
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287 | } |
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288 | |
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289 | s32 |
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290 | ofh_test_method(u32 nargs, u32 nrets, s32 argp[], s32 retp[], ulong b) |
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291 | { |
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292 | if (nargs == 2) { |
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293 | if (nrets == 1) { |
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294 | s32 *ap = DRELA(&ofh_active_package, b); |
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295 | u32 service = (s32)argp[0]; |
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296 | const char *method = (const char *)(ulong)argp[1]; |
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297 | s32 *stat = &retp[0]; |
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298 | |
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299 | (void)ap; (void)service; (void)method; |
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300 | |
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301 | *stat = 0; |
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302 | /* we do not do this yet */ |
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303 | return OF_FAILURE; |
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304 | } |
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305 | } |
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306 | return OF_FAILURE; |
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307 | } |
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308 | extern u32 _ofh_inited[0]; |
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309 | extern u32 _ofh_lastarg[0]; |
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310 | |
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311 | s32 |
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312 | ofh_handler(struct ofh_args *args, ulong b) |
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313 | { |
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314 | u32 *inited = (u32 *)DRELA(&_ofh_inited[0],b); |
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315 | u32 *lastarg = (u32 *)DRELA(&_ofh_lastarg[0],b); |
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316 | ofh_func_t *f; |
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317 | |
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318 | if (*inited == 0) { |
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319 | ofh_init(b); |
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320 | |
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321 | if ((ulong)ofd_mem(b) < (ulong)_end + b) { |
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322 | static const char msg[] = "PANIC: OFD and BSS collide\n"; |
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323 | s32 dummy; |
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324 | |
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325 | ofh_cons_write(DRELA(&msg[0], b), sizeof (msg), &dummy); |
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326 | for (;;); |
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327 | } |
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328 | |
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329 | *inited = 1; |
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330 | } |
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331 | |
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332 | *lastarg = (ulong)args; |
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333 | |
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334 | f = ofh_lookup((char *)((ulong)args->ofa_service), b); |
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335 | |
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336 | if (f == ((ofh_func_t *)~0UL)) { |
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337 | /* do test */ |
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338 | if (args->ofa_nargs == 1) { |
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339 | if (args->ofa_nreturns == 1) { |
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340 | char *name = (char *)(ulong)args->ofa_args[0]; |
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341 | if (ofh_lookup(name, b) != NULL) { |
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342 | args->ofa_args[args->ofa_nargs] = |
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343 | OF_SUCCESS; |
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344 | return OF_SUCCESS; |
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345 | } |
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346 | } |
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347 | } |
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348 | return OF_FAILURE; |
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349 | |
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350 | } else if (f != NULL) { |
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351 | return leap(args->ofa_nargs, |
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352 | args->ofa_nreturns, |
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353 | args->ofa_args, |
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354 | &args->ofa_args[args->ofa_nargs], |
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355 | b, f); |
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356 | } |
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357 | return OF_FAILURE; |
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358 | } |
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359 | |
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360 | /* |
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361 | * The following code exists solely to run the handler code standalone |
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362 | */ |
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363 | void |
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364 | __ofh_start(void) |
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365 | { |
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366 | s32 ret; |
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367 | u32 of_stdout; |
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368 | u32 ihandle; |
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369 | char buf[1024]; |
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370 | u32 args_buf[sizeof (struct ofh_args) + (sizeof (u32) * 10)]; |
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371 | struct ofh_args *args; |
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372 | |
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373 | args = (struct ofh_args *)args_buf; |
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374 | |
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375 | args->ofa_service = (u32)"finddevice"; |
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376 | args->ofa_nargs = 1; |
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377 | args->ofa_nreturns = 1; |
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378 | args->ofa_args[0] = (u32)"/"; |
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379 | args->ofa_args[1] = -1; |
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380 | ret = ofh_start(args); |
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381 | |
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382 | if (ret == OF_SUCCESS) { |
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383 | args->ofa_service = (u32)"finddevice"; |
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384 | args->ofa_nargs = 1; |
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385 | args->ofa_nreturns = 1; |
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386 | args->ofa_args[0] = (u32)"/chosen"; |
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387 | args->ofa_args[1] = -1; |
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388 | ret = ofh_start(args); |
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389 | } |
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390 | |
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391 | if (ret == OF_SUCCESS) { |
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392 | u32 phandle = args->ofa_args[1]; |
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393 | |
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394 | args->ofa_service = (u32)"getprop"; |
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395 | args->ofa_nargs = 4; |
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396 | args->ofa_nreturns = 1; |
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397 | args->ofa_args[0] = phandle; |
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398 | args->ofa_args[1] = (ulong)"stdout"; |
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399 | args->ofa_args[2] = (ulong)&of_stdout; |
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400 | args->ofa_args[3] = sizeof(of_stdout); |
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401 | args->ofa_args[4] = -1; |
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402 | ret = ofh_start(args); |
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403 | } |
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404 | |
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405 | ihandle = *(u32 *)((ulong)args->ofa_args[2]); |
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406 | |
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407 | if (ret == OF_SUCCESS) { |
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408 | /* instance to path */ |
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409 | args->ofa_service = (u32)"instance-to-path"; |
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410 | args->ofa_nargs = 3; |
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411 | args->ofa_nreturns = 1; |
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412 | args->ofa_args[0] = ihandle; |
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413 | args->ofa_args[1] = (ulong)buf; |
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414 | args->ofa_args[2] = sizeof (buf); |
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415 | args->ofa_args[3] = -1; |
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416 | ret = ofh_start(args); |
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417 | |
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418 | } |
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419 | |
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420 | if (ret == OF_SUCCESS) { |
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421 | /* open rtas */ |
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422 | args->ofa_service = (u32)"open"; |
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423 | args->ofa_nargs = 1; |
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424 | args->ofa_nreturns = 1; |
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425 | args->ofa_args[0] = (u32)"/rtas"; |
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426 | ret = ofh_start(args); |
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427 | if (ret == OF_SUCCESS) { |
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428 | u32 ir = args->ofa_args[1]; |
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429 | args->ofa_service = (u32)"call-method"; |
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430 | args->ofa_nargs = 3; |
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431 | args->ofa_nreturns = 2; |
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432 | args->ofa_args[0] = (ulong)"instantiate-rtas"; |
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433 | args->ofa_args[1] = ir; |
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434 | args->ofa_args[2] = (ulong)buf; |
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435 | |
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436 | ret = ofh_start(args); |
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437 | } |
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438 | } |
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439 | |
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440 | if (ret == OF_SUCCESS) { |
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441 | const char msg[] = "This is a test"; |
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442 | u32 msgsz = sizeof(msg) - 1; /* Includes \0 */ |
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443 | |
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444 | args->ofa_service = (u32)"write"; |
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445 | args->ofa_nargs = 3; |
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446 | args->ofa_nreturns = 1; |
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447 | args->ofa_args[0] = ihandle; |
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448 | args->ofa_args[1] = (ulong)msg; |
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449 | args->ofa_args[2] = msgsz; |
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450 | args->ofa_args[3] = -1; |
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451 | ret = ofh_start(args); |
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452 | } |
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453 | |
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454 | } |
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